1. 根目录:
2. sound
3. pci
4. ac97
5. ac97_patch.h

/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *  Universal interface for Audio Codec '97
 *
 *  For more details look to AC '97 component specification revision 2.2
 *  by Intel Corporation (http://developer.intel.com).
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#define AC97_SINGLE_VALUE(reg,shift,mask,invert) \
	((reg) | ((shift) << 8) | ((shift) << 12) | ((mask) << 16) | \
	 ((invert) << 24))
#define AC97_PAGE_SINGLE_VALUE(reg,shift,mask,invert,page) \
	(AC97_SINGLE_VALUE(reg,shift,mask,invert) | (1<<25) | ((page) << 26))
#define AC97_SINGLE(xname, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  .info = snd_ac97_info_volsw,		\
  .get = snd_ac97_get_volsw, .put = snd_ac97_put_volsw, \
  .private_value =  AC97_SINGLE_VALUE(reg, shift, mask, invert) }
#define AC97_PAGE_SINGLE(xname, reg, shift, mask, invert, page)		\
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  .info = snd_ac97_info_volsw,		\
  .get = snd_ac97_get_volsw, .put = snd_ac97_put_volsw, \
  .private_value =  AC97_PAGE_SINGLE_VALUE(reg, shift, mask, invert, page) }
#define AC97_DOUBLE(xname, reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
  .info = snd_ac97_info_volsw,		\
  .get = snd_ac97_get_volsw, .put = snd_ac97_put_volsw, \
  .private_value = (reg) | ((shift_left) << 8) | ((shift_right) << 12) | ((mask) << 16) | ((invert) << 24) }

/* enum control */
struct ac97_enum {
	unsigned char reg;
	unsigned char shift_l;
	unsigned char shift_r;
	unsigned short mask;
	const char **texts;
};

#define AC97_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmask, xtexts) \
{ .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
  .mask = xmask, .texts = xtexts }
#define AC97_ENUM_SINGLE(xreg, xshift, xmask, xtexts) \
	AC97_ENUM_DOUBLE(xreg, xshift, xshift, xmask, xtexts)
#define AC97_ENUM(xname, xenum) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  .info = snd_ac97_info_enum_double,		    \
  .get = snd_ac97_get_enum_double, .put = snd_ac97_put_enum_double, \
  .private_value = (unsigned long)&xenum }

/* ac97_codec.c */
static const struct snd_kcontrol_new snd_ac97_controls_3d[];
static const struct snd_kcontrol_new snd_ac97_controls_spdif[];
static struct snd_kcontrol *snd_ac97_cnew(const struct snd_kcontrol_new *_template,
					  struct snd_ac97 * ac97);
static int snd_ac97_info_volsw(struct snd_kcontrol *kcontrol,
			       struct snd_ctl_elem_info *uinfo);
static int snd_ac97_get_volsw(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol);
static int snd_ac97_put_volsw(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol);
static int snd_ac97_try_bit(struct snd_ac97 * ac97, int reg, int bit);
static int snd_ac97_remove_ctl(struct snd_ac97 *ac97, const char *name,
			       const char *suffix);
static int snd_ac97_rename_ctl(struct snd_ac97 *ac97, const char *src,
			       const char *dst, const char *suffix);
static int snd_ac97_swap_ctl(struct snd_ac97 *ac97, const char *s1,
			     const char *s2, const char *suffix);
static void snd_ac97_rename_vol_ctl(struct snd_ac97 *ac97, const char *src,
				    const char *dst);
#ifdef CONFIG_PM
static void snd_ac97_restore_status(struct snd_ac97 *ac97);
static void snd_ac97_restore_iec958(struct snd_ac97 *ac97);
#endif
static int snd_ac97_info_enum_double(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_info *uinfo);
static int snd_ac97_get_enum_double(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol);
static int snd_ac97_put_enum_double(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol);